mirror of
https://github.com/vale981/arb
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53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
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/*=============================================================================
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This file is part of ARB.
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ARB is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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ARB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ARB; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2015 Fredrik Johansson
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******************************************************************************/
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#include "acb_hypgeom.h"
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void
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acb_hypgeom_2f1_pfaff(acb_t res, const acb_t a, const acb_t b,
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const acb_t c, const acb_t z, int regularized, long prec)
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{
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acb_t t, u, v;
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acb_init(t);
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acb_init(u);
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acb_init(v);
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acb_sub_ui(t, z, 1, prec); /* t = z-1 */
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acb_div(u, z, t, prec); /* u = z/(z-1) */
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acb_neg(t, t);
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acb_neg(v, a);
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acb_pow(t, t, v, prec); /* t = (1-z)^-a */
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acb_sub(v, c, b, prec); /* v = c-b */
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acb_hypgeom_2f1_direct(res, a, v, c, u, regularized, prec);
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acb_mul(res, res, t, prec);
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acb_clear(t);
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acb_clear(u);
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acb_clear(v);
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}
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